关键词: pseudo-Riemannian manifold, Riemannian manifold, absolute differential, parallel displacement, relativity, covariance

Abstract: This paper gives various properties of eigenvalue problems related to the buckling of sandwich beams. The applications of eigenfunctions are also indicated.

Key words: pseudo-Riemannian manifold, Riemannian manifold, absolute differential, parallel displacement, relativity, covariance